The Irish province led 23-7 on the half hour mark.

Leinster are aiming for a record-equalling fifth European title.

Leinster lost last year’s final following a last-gasp try in Marseille

The tournament’s two most successful teams clash at the Aviva Stadium.

In previous seasons, Cullen has signed one year rolling contracts, but has today signed a new deal with Leinster that keeps him at the RDS until 2025.

The 31-year-old Leinster player sustained a neck injury during training in April.

The 27-year-old Leinster scrum-half said his experience has been “entirely positive”.